There are four laws of chemical combination, which describe the general qualities of a chemical change.
- Law of Conservation of mass states that matter is neither created nor destroyed but can be transformed from one form to another.
- Law of definite proportions states that all Pure Sample of a particular chemical compound contain the same number of elements mixed in the same proportion by mass. This law is also known as law of constant composition.
- Law of multiple proportions — It states that when two elements x and y combine to form more than one compound, then the several masses of element, x, which combine with a fixed mass of the other element, y are In a simple multiple ratio.
- Law of reciprocal proportion — It states that the masses of several elements A, B, C, which combine separately with a fixed mass of another element, D, are the same as the messes in which A, B, C themselves combine with one another.